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Cracked thermostat housing

Discussion in 'General Chit-Chat' started by Gordon Holsinger, Jan 4, 2020.

  1. Gordon Holsinger

    Gordon Holsinger Diamond Level Sponsor

    Does anyone have a method to get a cracked thermostat housing separated from the head? The problem I am having is that the studs have rusted and somewhere in the past someone used that horrible yellow gasket cement from 3M to glue the thing on.
  2. Wayne67vert

    Wayne67vert Silver Level Sponsor

    do you have the bolts off? I have used a razor scraper to separate stuck gasket material.
  3. RootesRacer

    RootesRacer Donation Time

    I had one years ago that the thermo housing would not come off the head till the 4 studs were removed. There was electrolysis corrosion between the steel and the housing that really locked it on there. Had to ruin the studs to get them off...
  4. sunalp

    sunalp Platinum Level Sponsor

    Try heating the aluminum . I've had success heating the aluminum part so that it expands away from the steel studs.
    Yes, electrolysis happens there, especially when left for long periods of time. Be patient with it and spray liberally
    with penetrating oil. If you have access to an oxy/acetylene torch that would be perfect but I've also had luck
    with Map gas.

    Good luck!
  5. Gordon Holsinger

    Gordon Holsinger Diamond Level Sponsor

    Steve it never fails to amaze me some of the repairs PO’s and shops have done on our cars! I was given a pile of parts that a previous Alpine owner gave me. The head is in pretty good shape straight, flat with a recent valve job. It is a series 3 judging from the casting # . This will be a spare for my collection of parts. I think what I will do is get as much of the yellow glue off and then see if a little heat will allow the studs to come out. If that fails heat the area around each stud and use pb blaster to soak the studs. The thermostat housing is of no use since it is cracked.
  6. Gordon Holsinger

    Gordon Holsinger Diamond Level Sponsor

    I gently heated my t stat housing stood the head on end and flooded the studs with pb blaster I will do it again tomorrow.
  7. sunalp

    sunalp Platinum Level Sponsor

    You don't have to be too gentle with it. It's broken, so you really can't brake it any more than it already is.
    Get it really hot!

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